PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

50877Washer,key

L3 Technologies, Inc. Div L3 Keo · NSN 5310-01-451-0119 · FSC 5310 · No Item Name Available
Verified by PartsTable
NSN 5310-01-451-0119 — this item is cataloged by the U.S. Government under National Stock Number 5310-01-451-0119. Primary manufacturer part number: 50877.
Features
  • Washer,key — FSC 5310
  • Hole Diameter: 0.266 INCHES NOMINAL IN
  • Material Document and Classification: ASTMB 194 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
  • External Straight Key Width: 0.200 INCHES NOMINAL IN
  • Material Thickness: 0.0145 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN
  • Outside Diameter: 0.500 INCHES NOMINAL IN
  • Material: COPPER ALLOY 172 OVERALL
  • 3 verified cross-references
Applications
  • Structural fastening and assembly
  • Equipment mounting
  • Panel and housing attachment
  • Applications requiring Copper Alloy 172 Overall construction
General Description

The Washer,key, cataloged under National Stock Number 5310-01-451-0119, is classified within Federal Supply Class 5310 (No Item Name Available) of the Hardware and Abrasives group. The primary manufacturer of record is L3 Technologies, Inc. Div L3 Keo. Government technical data includes 6 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 1 manufacturer, enabling identification through both NSN and commercial part number lookups. 6 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5310-01-451-0119
Primary Part Number50877
Item NameWasher,key
FSC / FSG5310 / 53 — No Item Name Available
ManufacturerL3 Technologies, Inc. Div L3 Keo
StatusACTIVE
Hole Diameter0.266 INCHES NOMINAL IN
Material Document and ClassificationASTMB 194 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
External Straight Key Width0.200 INCHES NOMINAL IN
Material Thickness0.0145 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN
Outside Diameter0.500 INCHES NOMINAL IN
MaterialCOPPER ALLOY 172 OVERALL
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 6
5935-00-149-3304RE B 49080 INTERCHANGEABLE
Adapter,connector
Naval Ship Systems Command
5360-00-468-408350877 INTERCHANGEABLE
Spring,helical,extension
General Electric Company
4820-01-163-1255050877 INTERCHANGEABLE
Disk,valve
Hydrasearch Company, Llc
4610-01-306-0242406004-1 INTERCHANGEABLE
Port,permeate,ro Vessel
Industrial Res Mch Pdts Llc
2510-01-379-9061 INTERCHANGEABLE
Shock Absorber,direct Action
6550-01-530-17040462A INTERCHANGEABLE
Solution,post-Thaw Storage,red B
Gvs Tm, Inc.
Cross-Reference Index
Part NumberManufacturer
050877 L3 Technologies, Inc. Div L3 Keo (USA)
50877 PRIMARY L3 Technologies, Inc. Div L3 Keo (USA)
887B050877 L3 Technologies, Inc. Div L3 Keo (USA)
Related Parts
5935-00-149-3304INTERCHANGEABLE
ADAPTER,CONNECTOR
RE B 49080
5360-00-468-4083INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
50877
4820-01-163-1255INTERCHANGEABLE
DISK,VALVE
050877
4610-01-306-0242INTERCHANGEABLE
PORT,PERMEATE,RO VESSEL
406004-1
2510-01-379-9061INTERCHANGEABLE
SHOCK ABSORBER,DIRECT ACTION
6550-01-530-1704INTERCHANGEABLE
SOLUTION,POST-THAW STORAGE,RED B
0462A

Frequently Asked Questions

What is NSN 5310-01-451-0119?

NSN 5310-01-451-0119 is a Washer,key, manufactured by L3 Technologies, Inc. Div L3 Keo, classified under FSC 5310 (No Item Name Available). Status: active.

What are the part numbers for NSN 5310-01-451-0119?

NSN 5310-01-451-0119 has 3 cross-referenced part numbers: 050877 (L3 Technologies, Inc. Div L3 Keo), 50877 (L3 Technologies, Inc. Div L3 Keo), 887B050877 (L3 Technologies, Inc. Div L3 Keo).

What NSN replaces 5310-01-451-0119?

There are 6 known substitutes for 5310-01-451-0119: 5935-00-149-3304, 5360-00-468-4083, 4820-01-163-1255 and 3 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 50877?

Key specifications for 50877: Hole Diameter: 0.266 INCHES NOMINAL IN; Material Document and Classification: ASTMB 194 ASSN STD SINGLE MATERIAL RESPONSE OVERALL; External Straight Key Width: 0.200 INCHES NOMINAL IN; Material Thickness: 0.0145 INCHES MINIMUM AND 0.0155 INCHES MAXIMUM IN. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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